chore: wait for deployment to completely delete before proceeding

[pjohnst5]

The windows overlay tests kept hitting:

--- FAIL: TestScaleDeployment (0.30s)
    load_test.go:141: Scale deployment
panic: could not update deployment win-load-test: Operation cannot be fulfilled on deployments.apps "win-load-test": the object has been modified; please apply your changes to the latest version and try again [recovered]
	panic: could not update deployment win-load-test: Operation cannot be fulfilled on deployments.apps "win-load-test": the object has been modified; please apply your changes to the latest version and try again

This was most likely because the deployment was not being completely deleted, before each test run
Now we wait for the deployment to be deleted before proceeding

[pjohnst5]

Closing in favor of #2312 which is the same, but on a branch directly from ACN, since we are no longer allowed to use forks